Dobby spring for loom harness mechanisms



March 3, 1931. F VE RE 1,794,911

DOBBY SPRING FOR LOOM HARNESS MECHANISMS Filed June 20. 1929 [raven/Z307" 170/7201" FLLve/Wnoflc.

Patented Mar. 3, 1931 UNITED STATES OFFIC HOMIER F. LIVERMORE, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR T0 H. IR-LIVER- MORE 00., OF ALLSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS DOIBBY srnnve FOR Loom irARNEssntEcHAmsms Application filed June 20,

' This invention relates to a spring and particularly to a dobby spring and means by which said spring is connected to the harness of a loom.

The object of the invention is to provide a ness connection therefor as set forth in the following specification and particularly as pointed out in the claims thereof.

Referring to the drawings:

Figure 1 represents a front elevation of a spring and harness connection therefor embodying my invention, a portion of the spring being broken away to save space in the drawings,and another portion ofthe spring being broken away and illustrated in section. Fig. 2 is a View similar to Fig. l illustrating a modified embodiment of the invention.

Like numerals refer to like parts throughout'the several views of the drawings.

In the drawings, referring particularly to Fig. 1, A represents a helical spring having a tapered portion a at one end thereof and an 'eye 5 at the other end thereof. Loosely mounted within the spring A and protruding from the tapered end a thereof is a wire 1 and the end portion of said wire that is located within the spring A has an enlarged portion preferably a loop 2 formed thereon,

the diameter of which is such that it cannot be pulled through the tapered end of the spring. At its other end the wire 1 is bent to form a hook 8 Which may be attached to a suitable connection provided upon the harness.

At a suitable location between the loop 2 and hook 3 the wire lis bent laterally to form an offset portion 4 of suflicient size to pre vent the wire from being moved intothe spring beyond a shoulder 5 which is formed 1929., senarirofiavaaaa.

b y the oifsetportion, and it'is evident that "the'l'oop 2 and-oifset portiond will permit a relative longitudinal movement between the spring A=and "wire 1, it being impossible to laiill the-wire outwardly through the tapered l end 'a of the spring because of the presence ofthe loop 2 in said tapered end or for the wire to drop downwardlyinto the spring beyond the shoulder 5. a

It will furthermore be evidentthatthe spring-may be lifted-independently of the wire 1 when the latter is attached to a harness until the upper extremity of the spring contacts with the shoulder 5.

In Fig. 2 I have illustrated a modified embodiment of my invention in which a wire 6 is connected to a spring A by means of a loop 7 which engages the tapered end portion a of the spring, and a hook 8 is formed at the opposite end of said wire from the loop 7. At an intermediate point of the wire an enlarged portion 9 is provided of sufficient diameter to form a shoulder 10 which is adapted to contact with the extremity of the spring A and prevent the rod 6 from being moved inwardly into said spring beyond said shoulder.

It is evident that the enlarged portion 9 may be formed integral with the wire 6 or said portion may constitute a collar which may be secured to the wire in any suitable manner. In all respects, the functions that are performed by the enlarged portion 9 and shoulder 10 are identical with the functions that are performed by the offset porbodied in said wire intermediate the ends thereof adapted to contact with the extremity of the spring and limit the relative longitudinal movement between the wire and sprin 2. n combination, a coil spring provided with a reduced end portion and a wire loosely mounted therein and projecting from said 7 reduced end, said wire being provided with a loop at one end thereofadapted to prevent the removal of the wire from said spring through said reduced end,'said wire also being provided with a shouldered portion interc mediate its ends adapted to contact with the extremity of the spring and limit the rela- 10 tivelongitudinal movement between the wire I andspring. a a I 3; In combination, a coil springprovided with a tapered end portion and a wire loosely I mounted therein and projecting fromsaid 15 tapered end, said wir'e fbeing'provid'ed'with -means at one end thereof'adapted to prevent .7 *theremoval of the wire from said spring; through said'tapered end, said wire-alsobeing" provided with a laterally bent oflset-por- 20 tion intermediate its ends adapted rte-contact with the extremity of'the spring and limitcthe relative longitudinal movement between the wire and spring. 1

In testimony whereof Ihave hereunto set .25 myhand. Y 1 I v f HOMER'F. LIVERMORE. i 

